CVE-2026-108599 Phi 0.1.1 through 0.28.4 Symlink Workspace Write Restriction Bypass
Attackers can bypass write restrictions via symlinks and prompt injection to modify external files, affecting users of the Phi AI agent tool.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-108599?
CVE-2026-108599 is a medium-severity path traversal vulnerability in pulseaiclub phi, published on 10 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
phi 0.1.1 through 0.28.4 contains an improper link resolution vulnerability that allows malicious repositories to bypass workspace_only_writes by exploiting lexical-only path checks in the permission gate. Attackers can commit symlinks pointing outside the workspace and use prompt injection to make the write tool write attacker-influenced content to external files without approval.
Weakness: CWE-59
Which versions are affected by CVE-2026-108599?
How do I fix CVE-2026-108599?
No fix has been published for CVE-2026-108599 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-108599 being exploited?
There is no known exploitation of CVE-2026-108599 in the wild and no public exploit code.
Sources
Also known as GHSA-mhj6-8rvv-3grj.